Data dictionary.xlsx

These data were collected from 4 laboratory visits and from one screening survey prior to participation. Participant consent to provide personal information was obtained prior to the screening survey and informed consent was obtained before participation in study procedures. All study procedures were approved by the Institutional Review Board at the University at Buffalo. This study tested delay discounting, relative reinforcement of snack food and <i>ad libitum</i> energy intake following one engagement of episodic future thinking (EFT), or the control episodic recent thinking (ERT). Visits 1 and 2 occurred prior to one week of daily engagement in EFT or ERT, and visits 3 and 4 occurred following 1 week of daily engagement in EFT or ERT. Anthropometric data and participant characteristics were collected on visit 1 along with a delay discounting task (Rollins, Dearing, Epstein, 2010), and snack food buffet to test <i>ad libitum</i> energy intake. The delay discounting task and snack food buffet were repeated on visit 4. Relative reinforcement value (RRV) of high energy dense (HED) compared to low energy dense (LED) snack food was measured on visit 2 and again on visit 3. The dependent variables, described in more detail in the full manuscript, analyzed from these tasks are listed below:Delay discounting task: area under the curve (AUC) calculated by plotting indifference points at 7 delays. Greater AUC= less discounting<i>Ad libitum</i> buffet: total energy intake, energy from HED food and energy from LED food (all in terms of kilocalories)RRV: breakpoint, or the highest schedule of reinforcement completed for HED and LED food.During the study, participants also completed a self report measure of impulsivity, the Barratt Impulsiveness Scale (BIS) (Patton, 1995). This scale was administered upon screening, during visit 1 and again on visit 4. They also completed a digital adjusting delay task (Koffarnus and Bickel, 2014) every day after engaging in EFT or ERT, and the natural log of k, the discount rate, was analyzed as the primary dependent measure from this task. <br><br>